Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848186 | Dual hydrostatic drive transmission | Robert J. Dorgan | 1989-07-18 |
| 4817432 | Digital ultrasonic instrument for ophthalmic use | Steven Feldon, Gary P. Mezack, Douglas L. Whiting, William J. Dally, Scott A. Karns | 1989-04-04 |
| 4807495 | Temperature-dependent infinitely variable ratio transmission control system and method | — | 1989-02-28 |
| 4809276 | Memory failure detection apparatus | Richard A. Lemay | 1989-02-28 |